Across:
3. hiding
6. snowthrow
8. barbat
10. kougra
11. one
13. poptart

Down:
1. potion
2. shadow
4. cho
5. chia
7. hop
8. battle
9. toy
12. art
13. pet

Thaks m_t_labienus for posting the answers in the comments. Have the day off work today, and I slept in.....